Forum Discussion

rpalacios_79340's avatar
rpalacios_79340
Icon for Altostratus rankAltostratus
Nov 30, 2010

iRules for monitoring pool members

Hello guys,     Here's the challenge that I have at the moment. I need to trigger a service re-select if a web server is no longer listening two ports. The configured health monitor for the pool...
management
monitoring
hoolio's avatar
hoolio
Icon for Cirrostratus rankCirrostratus
Nov 30, 2010
You could use a browser plugin like Fiddler or HttpFox for Firefox and make a request to the application. Or if it's a webservice, capturing a tcpdump would work. Try to find a request which tests the functionality of the service without doing something that is too computationally expensive for the applications. If you want help configuring the monitor strings once you have sample requests, post sanitized copies of the requests and responses.

 

 

Also, can you confirm which LTM version you're running? The monitor send string processing has changed slightly over the versions. Here are two related solutions on this:

 

 

SOL10655: Change in Behavior: CR/LF characters appended to the HTTP monitor Send string

 

http://support.f5.com/kb/en-us/solutions/public/10000/600/sol10655.html

 

 

SOL2167: Constructing HTTP requests for use with the HTTP or HTTPS application health monitor

 

http://support.f5.com/kb/en-us/solutions/public/2000/100/sol2167.html

 

 

Aaron